feat: 更新表单分组

src/components/app-form-group/app-form-group.less

 .app-form-group {
 
     >.ivu-card-head {
-        >p {
+        >div {
+            position: relative;
+            font-size: 14px;
+            color: #031129;
+            font-weight: 600;
+            line-height: 24px;
+            padding-left: 12px;
+            &:before {
+                position: absolute;
+                top: 50%;
+                left: 0;
+                width: 4px;
+                height: 18px;
+                content: '';
+                background-color: #1A6AFF;
+                transform: translateY(-50%);
+            }
             >i {
                 margin-right: 8px;
                 cursor: pointer;

src/components/app-form-group/app-form-group.vue

@@ -13,11 +13,11 @@
         </template>
         <template v-else>
             <card v-if="isShowCaption === true" :bordered="false" :dis-hover="true" :class="classes">
-                <p class='' slot='title'>
+                <div class='' slot='title'>
                      <icon v-if="titleBarCloseMode !== 0" :type="collapseContant ? 'ios-arrow-dropright-circle' : 'ios-arrow-dropdown-circle'"
                     @click="clickCollapse"></icon>
                     <span :class="titleClass">{{caption}}</span>
-                </p>
+                </div>
                 <template v-if="uiActionGroup">
                     <a slot='extra'>
                         <template v-if="uiActionGroup.extractMode && Object.is(uiActionGroup.extractMode, 'ITEMS')">